Access and download CBSE Class 11 Biology Question Paper Set O Solved, carefully designed as per the latest 2025-26 examination guidelines issued by CBSE, NCERT, and KVS. These Class 11 Biology previous year question papers include detailed solutions, helping students to assess their performance and identify and improve key areas before the final exams.
Solved Biology Question Papers for Class 11
Practicing these Class 11 Biology question papers is the best way to understand the actual exam pattern and marking scheme. By solving these papers under timed conditions, Class 11 students can improve their speed and accuracy. Download the full CBSE Class 11 Biology Question Paper Set O Solved to begin your self-assessment today.
Biology Class 11 Question Paper PDF with Solutions
1 Name the bile pigments.
2 Why are red muscles called aerobic muscles?
3 What are catecholamines?
4 Define phyllotaxy.
5 Ribs are referred to as bicephalic. Give reason.
6 Name the instrument used for measuring the pulmonary volumes. What is its significance?
7 What is the condition called in which an Rh-positive foetus suffers in a Rh-negative mother’s body? How can it be avoided?
8 What are ammonotelic animals? Give two examples
9 What are ear ossicles? Name them in correct sequence beginning from the ear drum.
OR
What are true ribs? How many pairs of true ribs are there in our skeletal system?
10 Axoplasm of a resting axon is negatively charged. Why?
11 Name two parts of adenohypophysis. Name one hormone secreted from each.
12 Describe two types of venation.
13 Draw a labeled diagram showing different parts of a root.
14 Draw a labeled sketch of human urinary system with associated blood vessels.
15 Name the types of joints between:
a) Atlas/axis
b) Between cranial bones
c) Between vertebrae
16 Where are synaptic vesicles found? Name their chemical contents. What is their function?
OR
Name the parts of hind brain. Give one function of each.
17 What are pneumatophores? How do they help the plant? Give one example of a plant that posses hese roots.
18 a) Define hormones.
b) Distinguish between exocrine and endocrine glands.
19 a) Thoracic chamber is a closed chamber. Justify.
b) Why is such set up necessary?
20 Name the common axis bearing number of leaflets? What does it represent morphologically? What do you call such types of leaves?
21 Differentiate between pulmonary circulation and systemic circulation. The muscular wall of the left ventricle is thicker than that of the right ventricle. Give reason.
22 Identify the hormone secreted by Parathyroid gland. Why is it called Hypercalcaemic hormone. Name another hormone which reduces the blood calcium level.
23 Name the three major cells in gastric glands and mention their functions. mucus neck cells which secrete mucus.
24 Describe any three types of aestivation with diagrams.
25 Name the wall layers of alimentary canal. Draw a labeled diagram. Identify the largest lymph vessel present in lymph.
OR
Name the factors responsible for exchange of gases in the alveoli. Define Oxygen dissociation curve. List the three layers of diffusion membrane.
26 Explain sliding filament theory.
OR
List the three types of neurons based on their number of axons and dendrites. Mention their location. Identify two types of synapses. How are they different from each other?
27 What is a flower? Describe the parts of a typical angiosperm flower.
OR
Briefly describe the modifications seen in the following plant parts:
a) Tendril in Pea plant
b) Photosynthetic part of Acacia
c) Adventitious root of sugarcane
d) Underground stem of ginger
e) Pitcher of insectivorous plant
Please click on below link to download CBSE Class 11 Biology Question Paper Set O Solved
Important Practice Resources for Class 11 Biology
CBSE Class 11 Biology Question Paper Set O Solved
To understand the types of questions asked in past examinations, it is very important for Class 11 students to solve the CBSE Class 11 Biology Question Paper Set O Solved provided above. You can easily download these past papers for Class 11 Biology in PDF format for the last 10 years. By practicing these actual exam questions you will gain an understanding of the difficulty level and the variety of topics covered over the years. By solving these Previous Year Papers (PYPs) you will understand both descriptive and MCQ questions in your final tests.
Importance of solving CBSE Class 11 Biology Question Paper Set O Solved
Regularly practicing CBSE Class 11 Biology Question Paper Set O Solved is the best way to improve your score in Class 11 Biology. These papers will give you details of the marking scheme and the paper structure used by the CBSE. By regularly attempting these under actual exam conditions at home, you can slowly improve your time management skills, which will help you to complete your Biology paper within the allowed duration.
Benefits of downloading CBSE Class 11 Question Papers
Having the CBSE Class 11 Biology Question Paper Set O Solved in PDF format allows you to revise key concepts anywhere, even without an internet connection. These sets are a reliable tool to practice numerical problems and understand the correct approach to all types of answers. After solving the questions, you should compare your work with the solutions provided by our teachers. Along with these papers, students should always solve the Class 11 Biology Sample Papers and MCQ tests on studiestoday.com for a complete revision.
The CBSE Class 11 Biology Question Paper Set O Solved is available for download on StudiesToday.com. It includes complete set with all sections so that Class 11 students can practice with the exact same paper that came in the CBSE exams.
Yes, the solutions for CBSE Class 11 Biology Question Paper Set O Solved are prepared by subject matter experts as per official marking scheme. Class 11 students will understand the structure of answers and 'step-marks' methodology Biology.
Solving previous year papers like CBSE Class 11 Biology Question Paper Set O Solved is important to understand repeat themes and question difficulty levels of Biology. It helps Class 11 students to test their time management skills too.
Yes, where applicable, CBSE Class 11 Biology Question Paper Set O Solved is available in both English and Hindi mediums. All students from Class 11 can access Biology study material in their preferred language.
No, all previous year question papers on StudiesToday, including CBSE Class 11 Biology Question Paper Set O Solved, are provided free of charge in mobile-friendly PDF.